Non-latin block title breaks the UI html and hides any data after itself

Just see the attached printscreen.
How to reproduce:
1. Create a view or edit the existing one.
2. Edit Block name in Block settings section. Enter cyrillic symbols (try to copy/paste these one: Блок список проектов ) //translates as "Block projects list"
3. The top part of attachment displays the behaviour of the UI before any actions. The bottom part of attachment displays the behaviour of the UI after any action is performed (edit any other field, add new field etc.)
Seems like there are non-utf-safe functions somewhere in code.